[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Phylum Platyhelminthes Gegenbaur, 1859 - flatworms
     Class Turbellaria Ehrenberg, 1831 - planarians see Subphylum Turbellaria Ehrenberg, 1831
       Order Acoela Uljanin, 1870 - acoels see Class Acoela Uljanin, 1870
         Family Haploposthiidae Westblad, 1948
           1 Genus Adenocauda Dorjes, 1968
           2 Genus Afronta Hyman, 1944
           3 Genus Haplogonaria Dorjes, 1968
           4 Genus Haploposthia An der Lan, 1936
           5 Genus Kuma Marcus, 1950
           6 Genus Parahaplogonaria Dorjes, 1968
           7 Genus Parahaploposthia Dorjes, 1968
           8 Genus Pseudohaplogonaria Dorjes, 1968
           9 Genus Simplicomorpha Dorjes, 1968